Grate for burning sawdust



(No Moflel.)

M. J. LYONS. GRATE FOR BURNING SAWDU ST.

No. 299,485. Patented May 27, i884.

% ATTORNEYS n. PETERS. mowmhu nmr. Washinglall, o. c.

Fries.

PATENT MICHAEL J. LYONS, OF SAGINAIV, MICHIGAN.

GRATE FOR BURNING SAWDUST.

SPECIFICATION forming part of Letters Patent No. 299,485, dated May 27, 1884:.

Application filed March 20, 1884.

To all whom it may concern:

Be it known that I, MICHAEL J. LYoNs, a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Grates; and I do declare the following to be a full, clear, and exact description'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of this inventi0n,and shows a vertical section. Fig. 2 is a section taken where the broken line a: a: is marked on Fig. 1. Fig. 3 is a top view of the supplemental grate. Fig. 4 is a vertical section of the same.

This invention has relation to asupplemental grate for use in mills where sawdust is employed for fuel, and has for its object to equalize the distribution of the fuel, and to prevent banking of the sawdust at particular points. In the ordinary method used in this variety of mills the sawdust employed as fuel is introduced by a continuous feeder through a spout placed between two adjacent boilers, and falling always upon one spot it soon banks to such an extent as to prevent the passage of air, and the combustion is thereby greatly retarded. 1

This invention consists of a supplemental-" grate surface adapted to be placed directly under the spout, and serving by means of its inclined sides to guide the sawdust on each side in such a manner as to equalize or nearly equalize the thickness of the sawdust upon the grate to prevent banking, as hereinafter fully 7 (No model.)

placed the supplemental distributing-grate C. The form of this grating is preferably that shown in the figure, being triangular, or nearly so, having one end A form in cross-section,

,as shown in the drawings, this shape being such as to throw the dust back as well as to the sides. This grate is distinct from the ordinary grating upon which it is placed, and is secured thereto by bolts or other means which will allow of its removal when desired, or When other fuel than sawdust is to be used. It is set in position with the A form end nearly against the arch-front and directly under the feeding-spout. This grate is hollow, and its walls are provided with perforations or apertures v, to allow the free passage of the air. These perforations are made smaller at the outer ends to avoid clogging or filling by the sawdust. WVhen the sawdust is fed on the supplemental-grate surface through the spout, it

is guided laterally by the inclined sides of the supplemental-grate surface, and its distribution is equalized to a great extent. At the same time the sawdust is prevented'from banking up under the feeding-spout.

Having described this invention, what I claim as new, and desire to secure by Letters Patent, is-

The hollow supplemental grate herein described, to be used in furnaces in which sawdust is used for fuel, being of A form at one end, and provided with a straight closed perforated wall, and of tapering triangular form at its opposite end, the walls of which are also provided with perforations, being of greater diameter at their inner than their outer ends, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

MICHAEL J. LYONS.

\Vitnesses:

J. H. BENNETT, A. G. HUBBELL. 

